CONTEXT AND PORES COLORED. 



mycelial core, hard, amorphous, grumous, dark brown. Flesh fibril- 

 lose, ferruginous brown (Sudan brown). At first zonate, soft, watery, 

 and spongy, at length dry, hard. Pores small, round, about 1 cm. long, 

 with tissue concolorous with the context, when fresh the mouths 

 silvery and glancing. Hyphae deeply colored. Setae scanty and rare, 

 often not found. Spores very abundant, globose or compressed 

 globose, 5-6x6-7, deeply colored, smooth. 



Fig. 695. 



Polyporus Mikadoi. 



Fig. 696. 



Polyporus rheades. 



This is not a frequent species in Europe, and has borne a number of names. 

 Its history has been gradually unfolding for us for a number of years, and only lately 

 have we gotten a comprehensive view of it. Originally it was called Polyporus rheades 

 by Persoon from specimens sent him by Tussac, host not known. The specimens are 

 preserved in good condition at Leiden. Then Fries found it on poplar around 

 Upsala and named it Polyporus vulpinus. Then he found it growing soft and spongy 

 on oak, and called it Polyporus corruscans. Then he met old, indurated specimens 

 on oak and referred it to Polyporus fulvus "Scop." He never knew that these three 

 plants were all the same. Bresadola illustrated it as Polyporus rheades growing on 

 Tamarix, which Patouillard changed to Polyporus tamaricis and Bresadola accepted. 

 We have always supposed the plant on Tamarix was a different species, but when we 

 compared them to find the difference, we found them exactly the same. 



Polyporus rheades first develops a mycelial core of a different texture and a 

 different nature entirely from the flesh. Hartig first pointed this out under the mis- 

 determination of Polyporus dryadeus. This core is not only characteristic, but 

 peculiar to the species as far as known. (We think "Forties" graveolens has a similar 

 development, but that is another story.) It is rather a rare plant in Europe. In 



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